We have a heat pump dryer (Blomberg DHP24404W), and it works great for everything except cloth diapers. The diapers tend to not dry, and often are still wet after running the sani-dry cycle which is 3.5 hours long. Sometimes we run it two or three times and the diapers are still wet! We give up and hang them to dry. But a big load of towels or clothes dries perfectly.
I'm going to try cleaning the filters and sensors more religiously, but does anyone have ideas?